A 12500 kg railroad car travels alone on a level frictionless track with a constant speed of 17.0 m/s. a 5800 kg load, initially at rest, is dropped onto the car. what will be the car's new speed?

Durning the period when aurochs existed on Earth, they were preyed on by large predators. Some individual aurochs had stronger muscles than others.

What is quantum theroy with easy exmple

Acids weaken some substances. Bacteria in your mouth acts on sugar and produces acids. What would be the end result of this chemical reaction between your teeth and the acid produced?

1. On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and they hit the water 1.59 s later. How high was the bridge? 2.

If a boat and its riders have a mass of 1200 kg and the boat drifts in at 1.8 m/s how much work does sam do to stop it?

What force would be needed to make a 10kg bowling ball accelerate down the alleyway with an acceleration of 3m/s2

If traveling at equal velocities, which object would have the most momentum

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.

Friction between solids can be most accurately defined as the force that opposes the sliding motion of two surfaces that are touching each other. A. True B. False

1. For a reaction to occur, energy must be to break chemical bonds. O A released OB converted OC absorbed